BENDIX BW1440 Bedienungsanleitung

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1
SD-03-2010
Bendix
®
PR-2
, PR-3
& PR-4
Pressure Protection Valves
DESCRIPTION
The pressure protection valve is a normally closed,
pressure control valve which can be referred to as a
non-exhausting sequence valve. These valves are used in
many different applications. An example would be in an air
brake system to protect one reservoir, or reservoir system
from another, by closing automatically at a preset pressure
should a reservoir system failure occur. The valves can also
be used to delay lling of auxiliary reservoirs to ensure a
quick build-up of brake system pressure.
The Bendix
®
PR-2
and PR-4
pressure protection valves
have one 1/4” N.P.T.F. supply port and one 1/4” N.P.T.F.
delivery port which are identi ed. Both valves are provided
with two 9/32” mounting holes through the body. The closing
pressure of the PR-2
valve is externally adjustable while
the PR-4
valve has a xed setting.
DELIVERY
PORT
SUPPLY
PORT
PISTON
SPRING
INLET
VALVE
CAP
BENDIX
®
PR-4
PRESSURE PROTECTION VALVEBENDIX
®
PR-3
PRESSURE PROTECTION VALVE
PR-3
OR PR-4
PRESSURE PROTECTION
VALVES
INLET
VALVE SPRING
INLET
VALVE
PISTON PLUG
O-RING
PRESSURE
REGULATING
SPRING
VALVE STEM
PISTON PLUG
BENDIX
®
PR-2
PRESSURE PROTECTION VALVE
EXHAUST
VENT
PISTON
O-RING
PISTON
SPRING
RETAINER
INLET
VALVE
PISTON
SPRING
CHECK
VALVE
CAP
SUPPLY
PORT
DELIVERY
PORT
SUPPLY
PORT
DELIVERY
PORT
PR-2
PRESSURE
PROTECTION VALVE
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Inhaltsverzeichnis

Seite 1 - DESCRIPTION

1 SD-03-2010Bendix® PR-2™, PR-3™ & PR-4™ Pressure Protection ValvesDESCRIPTIONThe pressure protection valve is a normally closed, pressure control

Seite 2 - REMOVING AND INSTALLING

2OPERATIONAir entering the supply port is blocked from fl owing out the delivery port by the inlet valve, which is normally held closed by the pressur

Seite 3

3GENERALAfter installing a replacement valve, it is recommended that the operating and leakage checks be performed as outlined in this manual. If the

Seite 4

4BW1440 © 2011 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 5/2011 • All rights reserved.

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